SQL Comments Tutorial with Example
SQL is a defacto language used to manage, query, select, filter data in a relational database. Similar to the programming languages SQL provides comments in order to make the SQL query or clause more readable...
Category: Oracle
SQL UPDATE Statement and Query with Examples
SQL databases provide structured data storage capabilities. We can store data in tables with columns and rows. Other useful features for SQL databases are update capabilities. We can update SQL databases data in different ways...
Oracle “ORA-12162: TNS:net service name is incorrectly specified” Error and Solution
During the connection to the Oracle Database server with the sqlplus we may get an error with the ORA-12162 specifier. This error will prevent to connect to the Oracle Database Server. “ORA-12162: TNS:net service name is...
Oracle Database “sqlplus: error while loading shared libraries: libsqlplus.so” Error and Solution
sqlplus or sqlplus64 tools are used to connect and manage Oracle Databases. sqlplus64 is 64 bit version of the sqlplus. After installating these tools successfully when we try to run sqlplus command we may get...
How To Install Oracle Express Edition (XE) 18 On Linux?
Oracle is very popular database which is used by big enterprises, banks, governments etc. Oracle Database provides a lot of useful features to the MS SQL, PostgreSQL, MySQL etc. Oracle Express is lightweight database server...
How To Create, Use and Delete SQL View?
SQL Programming language and SQL Database engines provide some useful mechanisms in order to make management of the data easier. SQL View is one of them which can be used to create a table from...
Most Useful SQL Commands List with Examples
SQL or Structured Query Language is a standard language used to to create, list, update, delete databases, tables, records. It provides this functionality with different type of commands. In this tutorial we will learn popular...
SQL “Select Into” Statement Usage Tutorial
SQL provides different statements in order to select into existing table, variable, temp table in various database servers like Oracle, MySQL, PostgreSQL etc. In this tutorial we will examine how to use Select Into SQL statement...
How To Prevent SQL Injection in Php Applications?
I have an application and I have complex requests tot the server. There are a lot of database operations. Managing them can become very hard some times. In this situation how can I prevent sql...
What is The Difference Between Inner and Outer Join?
Sql is the language where a lot of data can be get with different logic. In an enterprise environment we may need to use complex SQL queries to get meaningful data. Inner is one of...
